Extension: Matrix functions
#include "dg/matrix/matrix.h"
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tridiaginv.h File Reference
#include <boost/math/special_functions.hpp>
#include "lapacke.h"
#include "dg/algorithm.h"
#include "functors.h"

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Classes

class  dg::mat::TridiagInvHMGTI< real_type >
 Compute the inverse of a general tridiagonal matrix. More...
 
class  dg::mat::TridiagInvDF< real_type >
 USE THIS ONE Compute the inverse of a general tridiagonal matrix. The algorithm does not rely on the determinant. More...
 
class  dg::mat::TridiagInvD< real_type >
 Compute the inverse of a general tridiagonal matrix. More...
 

Namespaces

namespace  dg
 Classes for Krylov space approximations of a Matrix-Vector product.
 
namespace  dg::mat
 

Functions

template<class value_type >
value_type dg::mat::compute_Tinv_m1 (const dg::TriDiagonal< thrust::host_vector< value_type > > &T, unsigned size)
 Computes the value of (T1)m1=em,T1e1 via a Thomas algorithm.
 
template<class value_type >
void dg::mat::compute_Tinv_y (const dg::TriDiagonal< thrust::host_vector< value_type > > &T, thrust::host_vector< value_type > &x, const thrust::host_vector< value_type > &y, value_type a=1., value_type d=0.)
 Computes the value of x=((aT+dI)1)y via Thomas algorithm.
 
template<class value_type >
void dg::mat::invert (const dg::TriDiagonal< thrust::host_vector< value_type > > &T, dg::SquareMatrix< value_type > &Tinv)
 Invert a tridiagonal matrix.
 
template<class value_type >
dg::SquareMatrix< value_type > dg::mat::invert (const dg::TriDiagonal< thrust::host_vector< value_type > > &T)
 Invert a tridiagonal matrix.
 
template<class value_type >
std::array< value_type, 2 > dg::mat::compute_extreme_EV (const dg::TriDiagonal< thrust::host_vector< value_type > > &T)
 Compute extreme Eigenvalues of a symmetric tridiangular matrix.